Compounds formed from P and Q are, respectively: Optically active S and optically active pair (T, U), Optically inactive S and optically inactive pair (T, U), Optically active pair (T, U) and optically active S, Optically inactive pair (T, U) and optically inactive S
Optically active S and optically active pair (T, U)
Optically active pair (T, U) and optically active S
Optically inactive pair (T, U) and optically inactive S
Optically inactive S and optically inactive pair (T, U)